I am trying to install lam on an IBM sp3 right now and later on a SP4.
I have two questions in relation to this.
lam-7.0 issues
WHen I unpack the latest version and run configure I get
checking size of FORTRAN INTEGER... unknown
configure: WARNING: *** Problem running configure test!
configure: WARNING: *** See config.log for details.
configure: error: *** Cannot continue.
bash-2.03$ tail config.log
#define STDC_HEADERS 1
#define _ALL_SOURCE 1
#endif
#ifdef __cplusplus
#include <stdlib.h>
configure: exit 1
bash-2.03$
I looked back about 100 lines and saw nothing I understood? has anyone
built this for aix 5.1??
Performance issue.
On these SP systems I am noticing a latency of a MPI_Send/Recv of about
1.2 to 1.5ms. Is this typical. With the native MPI I am getting
someing like .3ms or a factor of 4 better. I am trying using the IBM's
Colony switch for communication (binding to that IP vs the ethernet IP
on lamboot)
So, my basic question is does anyone have experience tuning this for the
IBM?? If so, what are the magic tricks that I can try..
Thanks
Matt
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